China Angular Contact Ball Bearings Suppliers - High-Quality Factory Options for Combined Loads
Angular Contact Ball Bearings Produced Include
- Single-row angular contact ball bearings
- Double-row angular contact ball bearings
- Four-point contact ball bearings
Structural Features of Single-Row Angular Contact Ball Bearings
Single-row angular contact ball bearings can only withstand axial loads acting in one direction. Under radial loads, an axial force is generated within the bearing, which must be counteracted by an opposing force. Therefore, these bearings typically require a second bearing for balance. Single-row angular contact ball bearings can accommodate more balls, providing higher load-carrying capacity.
Contact Angles Available in Three Variants
15° — Suffix Code: C
25° — Suffix Code: AC
40° — Suffix Code: B
Single-row angular contact ball bearings are classified into non-separable and separable types. Non-separable bearings are further divided into standard, high-speed, and ultra-high-speed series for different applications. Separable bearings (inner and outer rings can be installed separately) are used in components with limited installation space, such as magnetos, and are also referred to as magneto bearings.
Cages for Non-Separable Bearings
- Standard cage: Fiber-reinforced phenolic resin cage, guided by the inner ring (no suffix code).
- TA: Fiber-reinforced phenolic resin cage, guided by the outer ring
- TN: Glass fiber-reinforced nylon 66 molded cage
- M: Machined brass cage
Cages for Separable Bearings (Magneto Bearings)
- Primarily use glass fiber-reinforced nylon 66 molded cages.
- Stamped brass cages are available upon request.
Bearings with glass fiber-reinforced nylon 66 molded cages are suitable for most applications and can operate normally within a temperature range of -30°C to +120°C.
Four-Point Contact Ball Bearings
Four-point contact ball bearings are a type of single-row angular contact ball bearing with raceways designed to accommodate bidirectional axial loads. These bearings require less axial space compared to double-row bearings. The four-point contact ball bearings listed in the table below have a contact angle of 35°. The inner ring is split into two halves, allowing for a larger number of balls and thus higher load capacity. The bearings are separable, meaning the two halves of the inner ring and the outer ring with the ball and cage assembly can be installed separately.
Double-Row Angular Contact Ball Bearings
Double-row angular contact ball bearings are designed similarly to two single-row angular contact ball bearings arranged back-to-back. However, their width is slightly less than two single-row bearings, and the contact angle is 30°. These bearings offer high rigidity, can withstand tilting moments, and are non-separable. Available design types include:
- With a filling slot on one side: This design allows for larger and more balls, enabling higher radial and unidirectional axial load capacity. Typically uses stamped steel or machined brass solid cages. Suitable for low-speed applications.
- Without a filling slot: This design can accommodate bidirectional axial loads of equal magnitude. Uses glass fiber-reinforced nylon 66 cages or stamped steel crown cages, resulting in minimal heat generation and lower operating temperatures. This advantage is particularly important for high-speed operation.
- With shields or seals: Available with shields (non-contact) or seals (contact) on one or both sides. These sealed bearings are pre-filled with rust-preventive and lubricating grease (lithium-based #2 grease unless otherwise specified). Operating temperature range: -30°C to +100°C. They are permanently lubricated and require no maintenance.
Important Notes
Please read carefully before installation and use
- Do not heat or clean before installation.
- Bearings with shields are primarily suitable for inner ring rotation. If the outer ring rotates at speeds exceeding certain limits, grease may leak.
- For bearings with seals on both sides, the sealing lips contact grooves on the inner ring shoulders. The seals are made of oil-resistant and wear-resistant synthetic rubber, reinforced with steel sheets. The permissible operating temperature for seals is -40°C to +120°C.
- The seals are clamped into grooves on the outer ring shoulders, providing a deformation-free seal. The sealing lips exert slight pressure on the inner ring. Under extreme conditions (e.g., very high speeds or temperatures), grease may leak from the inner ring. If grease leakage is unacceptable for the application, special design measures may be required.
Frequently Asked Questions
QWhat is the difference between single-row and double-row angular contact ball bearings?
Single-row angular contact ball bearings can only withstand axial loads in one direction and typically require a paired bearing for balance. Double-row angular contact ball bearings are equivalent to two single-row bearings arranged back-to-back, offering higher rigidity and the ability to withstand bidirectional axial loads and tilting moments within a more compact width.
QWhat contact angle options are available for single-row angular contact ball bearings?
Three contact angle variants are available: 15° (suffix code C), 25° (suffix code AC), and 40° (suffix code B). A larger contact angle provides greater axial load capacity, while a smaller angle is better suited for high-speed applications.
QWhat are magneto bearings and where are they used?
Magneto bearings are separable single-row angular contact ball bearings where the inner and outer rings can be installed independently. They are designed for components with limited installation space, such as magnetos and similar compact assemblies.
QWhat is the operating temperature range for sealed double-row angular contact ball bearings?
Sealed double-row angular contact ball bearings pre-filled with lithium-based #2 grease are rated for an operating temperature range of -30°C to +100°C. Bearings with synthetic rubber seals can withstand temperatures from -40°C to +120°C.
QWhat cage materials are available for angular contact ball bearings?
Several cage options are available depending on the bearing type: fiber-reinforced phenolic resin cages (inner or outer ring guided), glass fiber-reinforced nylon 66 molded cages, machined brass cages, and stamped steel cages. The appropriate cage type depends on the application speed, temperature, and load requirements.
QHow do four-point contact ball bearings differ from standard angular contact ball bearings?
Four-point contact ball bearings feature a split inner ring and a 35° contact angle, allowing them to handle bidirectional axial loads within a single row. This design accommodates more balls for higher load capacity while requiring less axial space than double-row bearings, making them ideal for space-constrained applications.